PROBLEM TO BE SOLVED: To provide a probe fixing device wearable without imposing any strain on a human body, and an ultrasonic therapy apparatus with the probe fixing device.SOLUTION: A probe fixing device comprises: a ring (10) capable of holding a probe (100) irradiating an affected part of a human body with ultrasonic waves and a blade part (20) arranged on the outer peripheral surface of the ring (10) with some intervals in circumferential direction of the ring (10) and extending from the ring (10) to the radially outer side of the ring (10), and the surface of which facing one side in the axial direction of the ring (10) is a contact surface capable of being adhered to the human body.COPYRIGHT: (C)2015,JPO&INPIT【課題】人体に負担をかけることなく装着可能なプローブ固定具、及び前記プローブ固定具を備えた超音波治療器を提供する。【解決手段】人体の患部に超音波を照射するプローブ(100)を保持可能なリング(10)と、前記リング(10)の外周面に前記リング(10)の周方向に間隔をあけて設けられ、前記リング(10)から前記リング(10)の径方向外側に延在するとともに、前記リング(10)の軸方向一方側を向く面が前記人体に密着可能な接触面とされたはね部(20)と、を備えるプローブ固定具。【選択図】図1